Dashed left edge = started before March 1820 ·
Dashed right edge = ongoing beyond March 1820
Events in March 1820 4
1738 – 1820Benjamin West (1738-1820)Died 11 March 1820, aged 81West was an American-born painter who became history painter to King George III and the second president of the Royal Academy in London. His history paintings, including The Death of General Wolfe, influenced a generation of artists.
1820Liberal revolt forces restoration of Spain's 1812 constitutionRiego's uprising begins the Trienio LiberalColonel Rafael del Riego led an army revolt at Cabezas de San Juan against King Ferdinand VII's absolutist rule. Facing widespread unrest, the king agreed in March to restore the liberal Constitution of 1812, opening a three-year constitutional period.
1820Missouri Compromise enactedUS Congress restricts slavery's expansion into the Louisiana Purchase territoryCongress agreed to admit Missouri as a slave state while barring slavery north of the 36°30′ parallel in the remaining Louisiana Purchase lands. The compromise, brokered largely by Henry Clay, postponed sectional conflict over slavery for a generation.
1820Maine admitted as the 23rd US stateSeparated from Massachusetts under the Missouri CompromiseMaine entered the Union as a free state on 15 March 1820, balancing the admission of Missouri as a slave state. It had been part of Massachusetts since colonial times.